A study followed of teenagers who had never smoked and tracked whether they took up smoking . Since nicotine in cigarettes changes brain chemistry, perhaps thereby affecting mood,or depression in teenagers.
Participates who were depressed at the start of the study were no more likely to be smokers after one year than those who were not depressed. After one year , the incidence of depression among those who had taken up smoking was four times as high as it was among those who had not.
According to the argument
cause: smoking: Effect: Depression
smoke caused Depression
Since nicotine changes brain chemistry, perhaps it is affecting mood, it is likely the smoking contributes to depression in tennagers.
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https://brainly.com/question/28810167
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